锂（Li）是最重要的轻元素之一。Li在较低的温度下即可发生核反应Li(p,α)He而分解，在恒星内部很容易被损耗，因此富锂巨星的发现相当令人震惊。观测上发现的富锂巨星对标准恒星演化模型提出了严峻挑战，表明至少存在一种或多种Li的增丰机制，使得富锂巨星可以存在。以往研究尽管提出了数种可能的机制，但相互之间存在较大的争议，且均受限于数量有限的样本。因此富锂巨星的形成机制到目前为止还不清楚。我们已经利用LAMOST巡天数据发现了超过1000颗富锂巨星候选体；拟通过高分辨率光谱的跟踪观测，对富锂巨星的恒星参数、重要元素的化学丰度、恒星自转速度等信息进行高精度分析。基于以上数据，结合恒星在赫罗图上的位置，可以精确给出富锂巨星所处的演化阶段，特别是对于有星震学测量的开普勒天区，进而限制富锂巨星中Li可能的增丰机制，为完善恒星演化理论提供重要依据。

Lithium (Li) is one of the most important light elements. The discovery of the Li-rich giants was quite surprising, as Li can be easily destroyed via the reaction Li(p,α)He at a relatively low temperature, making this element rapidly disintegrate in the interior of a star. The existence of Li-rich giants poses severe challenge to the standard stellar evolutionary model, implying there is one or more mechanisms that can enrich Li in the atmospheres of such type of stars. Previous studies have proposed several possible scenarios, but it is still unclear why Li-rich giants exist. We have found more than 1000 Li-rich candidates from LAMOST survey. With the high-resolution follow-up observations, the project will focus on the analysis of stellar parameters, detailed chemical abundance pattens and rotation velocities of Li-rich giants. With the help of those data and the location of the stars on the HR Diagram, the accurate evolutionary stages of the sample stars will be derived, especially for the stars in the Kepler field with high-precision data from astroseismology. Based on those results, one can put more reliable constraints to the scenarios of Li enrichment, and also to the stellar evolutionay theory.